func (layer *Layer) Wkbs() chan []byte {
wkbs := make(chan []byte)
go func() {
defer close(wkbs)
C.OGR_L_ResetReading(layer.v)
for {
feature := C.OGR_L_GetNextFeature(layer.v)
if feature == nil {
break
}
geom := C.OGR_F_GetGeometryRef(feature)
size := C.OGR_G_WkbSize(geom)
buf := make([]byte, size)
C.OGR_G_ExportToWkb(geom, C.wkbNDR, (*C.uchar)(&buf[0]))
wkbs <- buf
C.OGR_F_Destroy(feature)
}
}()
return wkbs
}
func (layer *Layer) Wkts() chan string {
wkts := make(chan string)
go func() {
defer close(wkts)
C.OGR_L_ResetReading(layer.v)
for {
feature := C.OGR_L_GetNextFeature(layer.v)
if feature == nil {
break
}
geom := C.OGR_F_GetGeometryRef(feature)
var res *C.char
C.OGR_G_ExportToWkt(geom, &res)
wkts <- C.GoString(res)
C.CPLFree(unsafe.Pointer(res))
C.OGR_F_Destroy(feature)
}
}()
return wkts
}
// Fetch the next available feature from this layer
func (layer Layer) NextFeature() Feature {
feature := C.OGR_L_GetNextFeature(layer.cval)
return Feature{feature}
}